CN101222980B - Polishing machine - Google Patents

Abstract

The invention relates to a polishing machine for rice or other cereals, said machine comprising an octagonal strainer basket (5) and a polishing compartment. The strainer basket (5) comprises two curved walls in the form of shells comprising inwardly projecting ribs (10). The two halves are connected to a divided strainer (2), preferably by means of screwing and spacers, in order to form a supporting strainer basket (5).

Description

Polishing machine

Technical field

The present invention relates to a kind of polishing machine, even especially a kind of polishing machine or grinder that is used to polish or be used to grind grain of rice wheat etc.

Background technology

By prior art disclose be used for rice or other cereal, have level or vertically disposed grinding-or the polishing of polishing rotor-or grinder.For example EP-A-699478 or EP-A-646414 disclose the machine with vertically disposed rotor, are provided with grinding-or polishing tool at this rotor.Rotor and instrument partition distance ground are surrounded by a sieve, and this sieve is accommodated in again in the basket.This basket is surrounded by a housing, therefore grinds or polishes product and can discharge controllably.This housing can be solid outer cover or have the opening that is used for form.In addition, this rotor can be constructed to hollow shaft and have opening so that air and/or wetting air and/or water are fed in the process chamber in the zone of instrument.Equally, the air slot in the hollow shaft can be given the polishing tool of projection (Nocken) form for example and additionally have active surface (US-PS4829893) by direct configuration.Air passes polishing material and sieve and abrasive flour by sucking-off from the polishing material and transfer out.

Described rotor also can be provided with the instrument of combination, for example also can be provided with the polishing tool of peeling off-reach as EP-A-427504 is disclosed.

In order to remove abrasive flour or the polishing dust that those come out from the slot of sieve, described housing can be dug usually, so that the air that guiding is sucked.At this, shortcoming is: it is partly too big and the flowing velocity air that passes through is less in these zones that basket has spacing transverse to the rib of air stream or air guide housing usually.Additionally, also may form the leeward eddy current by horizontal fishplate bar.

Manufacturing with hollow shaft of a plurality of openings is to expend high and because the high pressure loss can appear in little open cross-section, this causes air mass flow to reduce and/or fan power strengthens.

Summary of the invention

Therefore the objective of the invention is, expand a kind of polishing machine, can avoid the above-mentioned shortcoming of prior art by it.Especially should between sieve and air outside guide housings, realize uniform air velocity on the one hand, with regard to the rice amount of passing through, realize the raising of polishing action (Polieraktion) on the other hand.

This purpose solves by the following technical programs, promptly the present invention proposes a kind of polishing machine that is used to grind ground or polishes the outer husk of ground husked rice or other cereal, has a rotor that is supported rotationally, on this rotor, be provided with and grind and/or the polishing and/or the instrument of peeling off, described instrument is surrounded by a sieve, this sieve is contained in the basket supportedly, it is characterized in that: this rotor has a polishing tool that has more than four projections, this sieve is made of two sieve plate or half shells that have respectively more than four angles, these sieve plates or half shell are connected by means of common Connection Element on separated part, wherein, between sieve and basket, be provided with a uniform gap as polishing room.

Rotor has one and has more than four, the polishing tool of preferred six projections, and wherein, this rotor is preferably with the rotating speed rotation higher than normal conditions.Under the situation of the corresponding power requirement of this polishing machine, the quantity of projection can for example be 10 or 12 apparently higher than above-mentioned situation also.

Verified, consider proper broken rice, the maximum (top) speed or the peripheral speed of rotor or instrument are restricted. therefore, for the quantity that improves the polishing action must make every effort to reach the angle quantity of number of slugs, sieve and the optimal proportion of rotor speed.

Basket and outside case cover are made of the wall of two bendings respectively.Preferred sieve is configured to have respectively to have preferred outwards towards the outstanding rib of case cover more than four, the half hull shape formula and the basket at preferred five angles.Angle quantity and described rib are suitable for sieving side relatively.The shell of sieve can be made of half shell of rounding ground camber arch.

This two and half one can preferably be connected to the housing of a support by screw connection and spacer element.Case cover with basket is passed through cover closure at two on distolateral.Spacing between sieve and the case cover is selected like this, makes to obtain gap as far as possible uniformly for uniform air velocity.Preferred this gap increases ground by the upside that sieves (perhaps on the opposite of aspirating the position) on spacing be a gap that broadens and the adaptive better thus air capacity of passing through up to the suction position with suction funnel by a narrow gap increase.

On top or on the opposite at suction position, seldom the air sieve of flowing through is only arranged, this air is towards the increase of suction position.For the cleaning effect of the best, this gap is constructed to the slowly gap of rising.

Particularly preferably be, these ribs can be provided with the grafting nose and housing wall is provided with slot, make these ribs can easily be located and for example can be from outside weldings, and this allows the stable sieve aspect pressure and vibration to receive.Because the spacing towards sieve also is uniformly, so the roughly the same height of air velocity in the Processing Room and can avoid the deposition of abrasive flour to a great extent.

Rotor can be constructed to solid shafting or simple pipe (hollow shaft), have on the polishing tool preferred six projections and air preferably rotor and be used for the internal diameter of feed worm screw of described polishing material and grinding or polishing tool, for example projection instrument between be directed.

Air preferably infeeds before product infeeds and with product and irrespectively is imported into and is directed in the machining area.Particularly preferably be, air is from two distolateral machining areas that enter into.

Another purpose is, expands a kind of method of the grain of rice that is used to polish or grind especially and can improve the gloss and the fineness on rice surface by this method.This purpose solves by following mode: promptly, the present invention proposes a kind of method that is used at the Processing Room polishing grain of rice, this Processing Room constitutes between a rotating rotor and a fixed sieve, on this rotor, be provided with a polishing tool, wherein, the grain of rice stands the influence of friction of grain-grain and polishing tool in Processing Room, it is characterized in that: the rotating speed of this rotor is by degree ground raising like this, at least 500 in the rice that makes the realization per kilogram pass through polishes action, and these polishings are moved by the rotary speed generation of the 7.6m/s at least that is positioned at epitrochanterian projection and this rotor.

This method can be implemented dryly or moisteningly.

Description of drawings

Describe the present invention in detail by means of accompanying drawing in one embodiment below.Shown in the figure:

Fig. 1 a: the cutaway view of the polishing or the machining area of grinder,

Fig. 1 b: the cutaway view of the machining area in second form of implementation,

Fig. 2: press the illustrated longitudinal sectional view of Fig. 1,

Fig. 3: the rotor of this polishing or grinder or the longitudinal sectional view of sieve structure,

Fig. 4: press the illustrated transverse sectional view of Fig. 3,

Fig. 5: transverse sectional view with rotor of the projection of accelerating.

The specific embodiment

One at this rotor 1 that only has an annular with the polishing machine shown in the part of waiting to be investigated, this rotor is equipped with common polishing tool 18, projection for example. in the zone of polishing tool, this rotor 1 is surrounded by an octagonal sieve 2, this sieve is made up of two sieve plates 3 and 4. and this sieve 2 is again by the sleeve-board form, the basket 5 of two-piece type surrounds, this basket 5 is made of two and half shells. sieve plate 3,4 with basket 5 by means of screw be connected 6 and spacer sleeve be connected to one from bearing unit, end plate 7 is used in this unit on distolateral, 8 sealings. between sieve 2 and basket, have a uniform narrow gap 9, realized uniform and high air velocity thus, this air velocity only allows the slight deposition tendency of abrasive flour.

These half shells of basket 5 have rib 10 highly less, that inwardly give prominence to, and these ribs advantageously are provided with the grafting nose.These half shells of basket 5 preferably have slot, so these ribs can easily be located by means of the grafting nose and for example can be from outside weldings.These half shells of basket 5 also can be acerous ground crooked to avoid the deposition of abrasive flour.

In another form of implementation, the quantity at the angle of polishing room (gap 9) is enhanced ten, and wherein, sieve plate 3,4 and basket 5 all have corresponding angle quantity.In this form of implementation, the polishing tool on the rotor 1 preferably also has six projections 23.Rotor speed also is enhanced to raise the efficiency.Peripheral speed for example minimum is 7.6m/s.Produce higher pressure peak in polishing room, this pressure peak helps to produce for the required frictional force of polishing process.The polishing of the rice amount of equally, at every turn passing through-or the quantity of pressure action be to bring up to per kilogram rice about 500 under the situation of 5t/h in production capacity.Can further improve the quantity of polishing action at least by the straight line of two polishing machines.

According to these two forms of implementation, realized sieving 2 stable bearing, this bearing can bear high vibration stress and pressure and this bearing by air intake 11 top, that be used to infiltrate air to air outlet slit 12 bottom, that have similar cross section sieve plate 3,4 and basket 5, have uniformly, the about spacing of 20mm.At this, air velocity can be about 20m/s.

Air can import to the sieve 2 by some passages 13,14 from both sides.Described air can be from passage 13 by the chamber between 15 arrival rotors 1 of the annular gap that is used for described polishing material between rotor 1 and the feed worm screw 16 and the sieve 2, so that then flow through gap 9 and and polishing material.In machining area, has a negative pressure.

Polishing tool 18 is by means of spoke 17 and rotor 1 partition distance, so air can almost unhinderedly flow.At this, the polishing tool 18 of star is pulled on the rotor 1.

The bearing 20 of rotor 1 seals by simple sealing device 19 and is isolated with flow air.Therefore, bearing pollutes can be very slight, because bearing 20 does not contact with the polishing material.

The polishing material enters, is transported to machining area and polished there and leave polishing machine by products export 22 by feed worm screw 16 by product inlet 21.

Generally, there are two air streams to be guided through machining area.The first bigger air stream passes described polishing material and sieve 2 derive grinding or the polishing powder, and second air stream passes basket 5 (air intake 11) and externally flows to avoid deposition around sieve 2 from top.

Can on amount, keep less to major general's second air stream by narrow gap 9, so fan and separator can correspondingly constitute littlely also.

The reference number table

1 rotor

2 sieves

3 sieve plates

4 sieve plates

5 baskets

6 screws connect

7 end plates

8 end plates

9 gaps

10 ribs

11 air intakes

12 air outlet slits

13 passages

14 passages

15 annular gaps

16 feed worm screws

17 spokes

18 polishing tools

19 sealing devices

20 bearings

21 product inlets

22 products exports

23 projections

Claims (9)

1. polishing machine that is used to grind the outer husk of ground or polishing ground husked rice or other cereal, has a rotor that is supported rotationally (1), on this rotor, be provided with and grind and/or the polishing and/or the instrument of peeling off, described instrument is surrounded by a sieve (2), this sieve is contained in the basket supportedly, it is characterized in that: this rotor (1) has a polishing tool that has more than four projections (23), this sieve (2) is by two sieve plates (3 that have respectively more than four angles, 4) or half shell constitute, these sieve plates or half shell are connected by means of common Connection Element on separated part, wherein, between sieve (2) and basket (5), be provided with a uniform gap (9) as polishing room.

2. by the described polishing machine of claim 1, it is characterized in that: this gap (9) are approximately 15-25mm.

3. by claim 1 or 2 described polishing machines, it is characterized in that: half shell of this basket (5) has the radial rib (10) of inside sensing and ground, angle is arranged or the bending of acerous ground.

4. by the described polishing machine of claim 1, it is characterized in that: this rotor (1) also has the feed worm screw (16) that is used to polish material, and is provided with an annular gap (15) between the internal diameter of rotor (1) and feed worm screw (16).

5. by the described polishing machine of claim 4, it is characterized in that: be provided with one and be used to that air is entered and the passage (13) by this annular gap (15).

6. by the described polishing machine of claim 1, it is characterized in that: described rotor (1) is constructed to solid shafting or pipe and has six to 12 projections (23).

7. by the described polishing machine of claim 1, it is characterized in that: described sieve (2) and basket (5) constitute dividually vertically and are connected on separated part, and wherein, the polishing room that constitutes between them is more than eight angles.

8. by the described polishing machine of claim 1, it is characterized in that: this gap broadens towards the sucking-off position.

9. be used for method at the Processing Room polishing grain of rice, this Processing Room constitutes between a rotating rotor and a fixed sieve, on this rotor, be provided with a polishing tool, wherein, the grain of rice stands the influence of friction of grain-grain and polishing tool in Processing Room, it is characterized in that: the rotating speed of this rotor is by degree ground raising like this, at least 500 in the rice that makes the realization per kilogram pass through polishes action, and these polishings are moved by the rotary speed generation of the 7.6m/s at least that is positioned at epitrochanterian projection and this rotor.

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